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engine="entity-auto" invoke="create" play the role for creating the records for the default-entity "Example."
Here for practice you may go by following further steps those steps will help you in understanding the concept then onwards you can practice the pattern given above  in your code as its the best practice for these kind of simple operations in OFBiz.

Writing CRUD Operations for Person Entity

- Here for the creation of record for person entity we will need to have the partyId for that so we will first call the service createPracticeParty then after getting the partyId we will create the record for person.
- Here we will be adding one add form in the bottom of the list form which we have for the person entity. This form will be calling the services for creating a record for person.
Step - 1 : Create the add form for the creation of person and add this in the same screen for person form.

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